If sex is a drive then desire should be spontaneous, like a hunger. When you see a sexy person or have a stray sexy thought, it activates an internal craving or urge for sex. That’s called “spontaneous desire”. It feels like it comes out of the blue. But there is another way of experiencing desire which is also healthy and normal, called “responsive desire”, where your interest only emerges in response to arousal. So, your partner comes over and starts kissing your neck and you’re like, “oh, right, sex, that’s a goodidea”.

Nagoski further explains, “A drive is a motivational system to deal with life-or-death issues, like hunger or being too cold. You’re not going to die if you don’t havesex.”

And the distinction is important, Nagoski said, because those who don’t often experience spontaneous desire may secretly worry that something is wrong with them, a mode of thinking that does not exactly help to put one in the mood. “Spontaneous desire is totally fun,” Nagoski said to New Scientist. “But you’re not broken just because you’re not experiencingit.”